Pump



arch 25 1924- J. E. DELK PUMP Filed June 16, 1922 2 Sheets-Sheet 1 s] nuanroz,

25 1924- 1488320 J. E. DELK PUMP Filed June 16, 1922 2 Sheets-Sheet 2 Patented ar. 25, 1924.

JAMES EVENS DELK, OF MARIETTA, GEORGIA.

PUMP.

Application filed .Tune 16, 1922. Serial No. 568,813.

To all whom it may concern:

Be it known that I, JAMES EVENS DELK a citizen of the United States, residing at arietta, in the county of Cobb and State of 6 Georgia, have invented a new and useful Pump, of which the following is a specification.

My invention relates to pumps, and particularly to pumps of the pressure type. The

object of my invention is to provide an efficient control of the pressure supply by which the pump is operated.

In the accompanying drawings- Fig. 1 is a more or less diagrammatic illustration of a layout in which my invention is embodied in one form;

Fig. 2 is an end elevation of the exhaust valve operating connection to the control head, drawn to a larger scale;

Fig. 3 is a longitudinal section through the exhaust valve, drawn to a still larger scale; and

Fig. 4 is a section on the line 4-4:, Fig. 1.

In systems of the present type the discharge of fluidis effected by an air piston supplied to a pump chamber submerged in the liquid to be pumped. In order to permit the pump to refill after each successive complete stroke of the air piston the pressure must be cut oif at the end of the stroke, the pump chamber exhausted in order to permit the liquid to flow in, and pressure must then be re-applied for the succeeding stroke of the pump. This may be acconrplished in various ways, but the invention particularly relates to a system of this type in which the air piston is derived from a source of pressure through an intermediate working tank to which a predetermined charge of air is admitted from the source of supply, the connection to the latter being then cut off while the connection to the pump chamber is then opened to force the liquid from the pump through a distributing system. Theparticular object of my invention is to provide a suitable control mechanism by which the charge and discharge from the working tank is effectively accomplished.

As shown inthe drawings, the invention is applied to a domestic'water'distribution system. The liquid to be pumped is assumed to be water in the well 5. Submerged in the water is a pump chamber 6 which opens to the water of submergence through a check valve 7 arranged in the bottom of the pump chamber. A discharge pipe 8 opens to the interior of the pump chamber adjacent the bottom of the latter, and is connected with 'a distributing line having usual outlet faucets or other discharge control devices. An equalizer box 9 is preferably arranged in the distribution system and is connected to the discharge line 8 by a branch connection 10.

To discharge the liquid from the pump 6, air under pressure is led thereto through a pipe 11 opening to the top of the pump chamber, and connected at its opposite end with the control head 20 of a working tank 21 of any appropriate capacity, to which air under pressure is supplied from any appropriate source, such as a pressure reservoir 27 Pipe 11 is also provided with a branch 12 through which the pump chamber 6 exhausts following each complete stroke of the air piston afiorded by pressure admitted thereto from the working tank 21 through the pipe 11. The valves which control the several ports, together with means for operating the same, form the special object of my invention.

The working tank 21 is connected with the pressure source 27 through the pipes 23, 28, in which are arranged a normally open gate valve 61, and an intermittently operated control valve 26. The seat 25 for the latter is formed at the outer end of the pipe section 23, and the valve chamber 28 in which the valve works is formed by the inter-engaged heads 24 and 29 of the respective pipe lengths 23 and 28. Valve stem 30 passes through the pipe length 23 into the control head 20 and lies in the path of the toggle lever 31, pivoted at 33 upon the bracket 32 carried by the control head. A valve spring 30 tends constantly to move the valve to closed position, this movement being in the direction of the flow of air under pressure from the reservoir 27 to the control head 20 of the working tank. I

The pipe 11 opening to the top of the pump chamber 6 is connected at its opposite end to the pipe lengths 56 and 57 by which the pipe is placed in connnunication with the interior of the control head 20. A valve seat 58 is formed intermediate the ends of the pipe section 57 and the valve 59 which bears against the seat is provided with a stem 60 which extends through the pipe 57 in o he interior of the control head 20 and is there jointed to the free end of the toggle lever 31 to move therewith. The toggle lever 31 thus controls both valves 26 and 59, and both of the latter are urged to their seats by the pressure of the air against the same. Thus, as above stated, the valve 26 is held to its seat by the pressure from the pressure source 27, while the valve 59 is held to the seat 58 by the pressure exerted thereon from the working tank.

The exhaust line 12 branched from the pressure line 11, leads to valve chamber 14 through the elbow connection 13. An exhaust passage 16 opens from the valve chamber 14 and is controlled by the exhaust valve 18, the stem of which passes through the exhaust passage 16 and carries at its outer end a thrust head 19 against which the spring 19 bears and tends constantly to hold the valve to its seat. It will be noted that the valve 18 is also normally held to its seat by the pressure in the system during the discharge stroke of the pump.

The several valves of the control head are controlled by the pressure-operated piston 37 here shown as of the flexible diaphragm type. The diaphragm 37 works in the pres sure chamber 38 afforded by the casing 38 and connected by the neck 39 with the control head 20 of the working tank. The piston rod 40 is connected at 40 to the arm 34 of the toggle 31, 34, the toggle arm 31 being connected to the toggle 34 through the operating spring 35. The piston rod is extended on the opposite side of the diaphragm 37 and passes through an adjustable thrust bearing 43 mounted on the yoke 15. Between the thrust bearing 43 and the diaphragm is interposed a coil spring 42 which opposes the outward displacement of the piston 37 by the pressure of the air within the working chamber. At its outer end the piston rod 40 is connected to the arm 44 of the toggle levers 4447 pivoted at 51' on the bracket 45, and connected at their outer ends by the pull spring 51. The throw of the toggle arm 47 is limited by the stop 50 in the form of a set screw carried by the bracket 49 from the yoke 15.

In the position of the parts shown, the valve 26 which controls the connection between the pressure source 27 and the working tank 21 is held open by the toggle arm 31, which bears against the stem of the valve in this position. At the same time the valve 59 is held to its seat by the toggle'arm 31, while the exhaust valve 18 is held open by the toggle arm 47. It is thus clear that the working tank 21 is being re-charged from the pressure source 27 through the control head 20 with which the working tank communicates through the neck 22. At the same time the escape of air from the working tank to the pressure line 11 is prevented by the closure of the valve 58. The pump chamber 6 is being relieved of its air under pressure through the open exhaust valve 18, while water from the well 5 is entering the pump chamber through the open check valve 7. Should there be a de mand on the distributing line at this time, water will flow through the distributing system from the equalizer tank 9 which is under a pressure commensurate with that of the air piston at the moment when its stroke is completed-mi other words, under a pressure determined by the effort of the spring 42.. As the air flows into the working tank from the pressure source 27 pressure is built up in the latter. This pressure exerts its effort against the piston 37 and overcomes the efiort of the spring 42. lVhen the piston 37 has been sufliciently displaced its connection with the levers 34 and 44 of respective toggles, shifts the associated ends of the toggle springs 35 and 51 across the axis of oscillation of the toggle levers 31 and 47, and the latter are thereupon moved with snap action to the opposite limit of their throw governed by the stops 52 and 50 respectively. The throw of the toggle lever 31 shifts the valve 59 to open position, thus admitting air from the working tank through the pipe 11 to the pump chamber 6. Simultaneously, the valve 26 closes under the effort of its spring 30, aidedv by the pressure of the air from the source 27, which now maintains the valve in seated position. At the same time, the throw of the toggle 47 releases the exhaust valve 18. and permits the latter to seat under the influence of, its spring 19 and the pressure in connection 12am the pressure line 11. The pressure from the working tank 21. is now conducted to the upper portion of the pump chamber 6, and exerting its effort on the liquid therein, forces the latter downward, thus closing the check valve 7 and causing the liquid in the pump chamber to flow out through the distributing line 8.

The cycle of operations is automatically repeated. As soon as the downward displacement of the water in the pump chamber permits the air charge in the working tank 21 to expand sufiiciently, and thus to reduce the pressure therein and inthe control head 20, the diaphragm 37 returns to its original position and throws the toggles again to the re-charging position shown in Fig. 1.

The arrangement of the valves in such position that they are held to their seats by pressure in the system during the working stroke of the pump, ii'isures the tight closure of the valves which is of great importance to the proper operation of the system. The operation of the Valves from the interior of the control head eliminates the necessity for packing, and thus avoids the danger of leakage and slow operation which are inci- Iran dental t0 glands of this type. The valves are all single acting valves, are readily manufactured, and adapted to their seats.

Various modifications in detail of con struction and operation will readily occur to those dealing with the problem, without departing from what I claim as my invention.

I claim' 1. A pressure pump system comprising a pump chamber, a pressure source and a working tank interposed between and connected to said pump and pressure source, a valve controlling the inlet from said pressure source to the working tank, a valve controlling the outlet from the working tank to the pump chamber, a pressure-responsive member associated with the worl ing tank, and means arranged within the working tank and operated by said pressure-responsive member for controlling said valves.

2. In a dispensing mechanism of the type described, a pressure source, a pump, a working tank interposed between the pressure source and. pump and connected thereto, an exhaust passage in the connection between the pump and working tank, valves controlling the connections from the working tank to the pressure source and pump, a valve controlling the exhaust, said valves being normally held to their seats by the pressure in the system, in combination with a pressure-operated member in communication with the 'working tank, and means associated therewith for operating said valves on predetermined fluctuation of the pressure in the working tank. 7

3. In a dispensing system of the type described, a pressure source, a, pump, a} working tank interposed between the pressure source and pump and connected thereto, valves controlling the connections from the working tank to the pressure source and pump, a pressure-operated member associated with the working tank, and means located within the working tank and operatively connected to said pressureoperated member to control said valves.

4. In a dispensing system of the type described, a pressure source, a pump, a working tank interposed between the pressure source and pump and connected thereto, valves controlling the connections from the working tank to the pressure source and pump, a. pressure-operated member associated with the working tank, and means located within the working tank and operatively connected to said 'pressure-operated member to control said valves, together with an exhaust port in the connection between the working tank and pump,

and valve means operatively associated with said 1: ressure-operated member for controlling said exhaust port.

5. In a dispensing system of the type described, a pressure source, a pump, a working tank interposed between the pressure source and pump and connected thereto, valves controlling the connections from the working tank to the pressure source and pump, a pressure-operated member associated with the working tank, spring toggle means located within the working tank, and operatively connected to said pressure-operated member to control said valves.

6. In a dispensing system of the type described, a pressure source, a pump, a working tank interposed between the pressure source and pump, a plurality of ports in the .working tank through which connection is established between said working tank and the pressure source and pump respectively, valves controlling the; flow of the pressure medium through said ports,-together with means located within the pressure tank and operated by the variations of pressure in said working tank to control said valves.

7. In a dispensing system of the type described, a pressure source, a pump, a working tank interposed between the pressure source and pump, a plurality of ports in the working tank through which connection is established between said working tank and the pressure source and pump respectively, valves controlling the flow of the pressure medium through said ports, together with spring operated toggle means located within the pressure tank and 0perated by the variations of pressure in said working tank to control said valves.

8. In a dispensing system of the type described, a pressure source, a pump, a, working tank interposed between the pressure source and pump, independent ports in said working tank, piping extending from said ports respectively to the pressure source and pump, independent valves controlling the flow through said pipes, a pressure-operated member mounted on the working tank, and means connected thereto and located within the tank for operating the valves in said pipings' on predetermined fluctuation of thepressurc in the working tank.

In testimony that I claim the as my own, I have hereto aflixed my signature in the presence of two witnesses.

J AS. EVENS DELK.

foregoing lVitnesses:

O. L. JoHNsoN, G. E. DANIELL. 

